FindRoot - Challenge Question

1. All quadratic equations have 2 roots. However, sometimes these roots are complex! For example, (x^2)+1=0 has roots of -i and i. Use FindRoot to find the roots of (x^2)+ π = 0.

2a) Define the function f(x)=({{{, ({{sin(x)+(x/10), x<12}, {1.85-(x/10), x>12}})}})

b) Plot the graph of f(x).

c) Find all roots of f(x) for x>0.